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AURTHUR W'BROWN E, OF BROOKLYN, NEW YORK, ASSIGN OR TO CHARLES R.SQUIREOF NEW YORK CITY. i i

Letters Pate-nt'No. 82,285, dated September 22, 1868.

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,TO ALL WHOM IT MAY OONCERN i Be it known that I, AURTHUR W; BROWNE, ofBrooklyn, county -of Kings, and State of New York, have inveted certainnew and useful Improvements in Rotary Engine's; and I doherehy declarethe following to be a full, clear, and exact description of the same,reference being had tothe accompanying drawing, making a part of thisspecification, in whichi 'Figure lis a Vertical transversc section. i wi Figure 2 is a side elevation of the shell er cylinder with the upperportion broken away, for the purpose of showing the form 'of thesteam-chamber lin section.

- Figure 3 represeuts one of the piston-slides'detached.

Similar letters of reference denote corresponding parts in all the'figures.

My invention relates to that class of rot'aryl engines which have a druminside of and eccentric to the shell Vor cylinder, andV which isdriven'or made to'revolve by the pressure of the steam upon a pistou orpistons, which slide or vibrate in slots through the drum, at rightanglesto its axis, thus conforming readily to the contour of the shell.i I I My improvement consists in the construction and arrangement ofparts whereby friction, and consequent wear and leakage, are largelyprevented, and also wherehy, 'on account of the engine being made moreefl'ectually self-packing, the waste of power from unavoidable wear isgreatly reduced. v

In' order that others skilled in the manufacture of engines may beenabled to make anduse my invention, I will proceed to describe it, withreference to the drawings. v

A is the shell or outer cylinder, ,which may be made in one piece or insegments. For the sake of convenience, I shall speak of it as being insegments. It is composed of the abutnient E E', provided with thepressurechamber O, and the two cocks D D.',` the segment HV H', and thetwo segments E Hand E' H'. The segment H H' I find is best made an exactare of ninety degrees, having a radius equal to the line H'I. Thesegments E H and E' H' should be eonstructed so as to conduct thepistons Gr to and from therpoints E E' H H', with as little friction andjar as possible, but beyondthat their exact' shape is immaterial. Theyhave each a port, F F', for the passage of steam, communicating'with thepipes K K', which pipes are 'used elternately, for the Vpurposeofinduction or eduction, as the engine is run either forward or backward.I

The steam-Chamber of the cylinder, that is, the eccentricspacee'xtending around the` drum B, from E to H, to, H',. to E', andtransversed by the piston G, is made slightly flaring from its outereircumferenca t oward its centre, so as to fit closely the piston, whichis made a little wedging, as shown at G, fig. 2.

The abutment E E' is located on the side of the shell oppositeto the areH H', and must be long enough to bring the points E E' diametricallyopposite to .these points H H7. Each end of the vahutment must fitaccurately the drum i I C is the'pressure-'chamher, provided with twococks, D and D' B is the drum, having slots or waysl extending throughfrom side to sideyintersecting its axis, and atl'ight angles with thesame, through which the pistons G-vibrate.

G G are the pistons, made in the usual form, except that at each endthey are made in the form of awedge, as shown in fig. 3.

Having described the construction of ,my engine, I will nowproceed toexplain its operation. Supposing that I wish it to run in thedirectionindicated by the arrows at H, fig. 1, I open the cock D, close cock D',and

admit the steam by the pipe KV; pressure is instantly applied to one ofthe' pistons Gr, which is traversing the ,are H H', and whichs heldclosely in contact with the surface of the cylinder by theforce of thesteam acting upon the other end of the same piston in thepressure-chamher C. .In case it is desired to run the engine in anopposite direction, I' close the cock D, open D', and admit'steam fromthe pipe K'. i

It'will be .seen that this construction does away with'nearly all thewearand conseduent leakage of steam pastl the pistonf, common to thisclass of engines, from the fact Vthat while the piston is passing fromH' to E', and fis being pushed into the drum, as shown at E', it is notsuhjected to the pressure of 'the steam upon either end; consequently itmoves easiiy and with butlittle wear. This results from the extension ofthe ports F and F', from the pipes K and K', up to the poinlsH and H',as seen in fig. 1. Then, again, the nnavoidahle Wear upon both the endsand the edges of the pistons is provided for by oonstrueting them andthe cylinder of lthe form described, and then, while the piston istraversing that portion of the cylinder between H and H' where steam isapplied to it, a'nd the leakage would occur, it (the piston) is made toadjust itself by means of the pressure of the steam in the charnber Cacting upon the opposite end of each piston during the time occupied inpassing between these points, thus making the engine self-packing.

Having thus desoribed the construction and operation of my invention,what I olaim, and wish to secure by i etters Patent, is-`- 1.v Thearrangement of the abutment E E', pressure-Chamber C, and the cocks Dend D'. 2. The pistons G, when construeted as set forth. 3. Theconstruction of the segment H H', forming the Chamber through which thepiston passes while being octed upon by the steam, as'herein set forth.

4. The arrangement in the shell of the rotary engine of the abutmentsE'E', pressure-Chamber C, and segments H H', substantially as set forth.

A. W. BROWNE.

Witnesses:

JOHN W. TANNER, WM. F. GooDWIN.

